Delmas Colliery is an operating underground coal mine located in Delmas, Mpumalanga, South Africa, managed by Kuyasa Mining (Pty) Ltd[1]. The mine employs the bord and pillar method and has been operational since 1964, producing approximately 2 million tonnes of coal per year, all of which is consumed domestically, some after beneficiation to reach an energy value of 24.0 MJ/kg[1][3].
The Delmas Coal North Shaft primarily functions as part of this mechanised underground operation, supporting the supply of thermal-grade, bituminous coal. The mine’s capacity is listed as 1.5 million tonnes per annum, with a workforce of around 174 people and reserves estimated at 56 million tonnes[1].
Delmas mine is significant for the region’s energy supply, notably as its coal supports the adjacent KiPower project—an independent power plant designed for reduced environmental impact and planned for a 600 MW generating capacity. This project marks the first instance in South Africa where a power plant was designed with a limited environmental footprint using lower-grade coal directly from the mine via conveyor[3].
The region surrounding Delmas has historically shifted from agriculture to intensive coal mining, impacting both land use and water quality. Cumulative mining activities in Delmas, including operations at the North Shaft and other nearby collieries, have raised environmental concerns such as water contamination and irreversible loss of agricultural land[5]. Regulatory enforcement regarding water and environmental protections has been criticized as weak in the area, with studies suggesting future risks of mine flooding and pollution of the Olifants River catchment once mining ceases[5].
Coal mining in the Witbank and Delmas coalfields has been a cornerstone of South Africa’s industrial development since the late 19th and early 20th centuries, powering local industries and national energy infrastructure. The region remains strategically important for domestic coal supply, with most production consumed by the national market and a strong focus on energy generation[2][6].